1. Okwu mmalite
Hydroxypropyl methylcellulose (HPMC) bụ ihe dị mkpa sitere na cellulose sịntetik nke a na-ejikarị eme ihe na ihe owuwu ụlọ, nkwadebe ọgwụ, ihe mgbakwunye nri na ihe ịchọ mma. Njide mmiri ya dị mma bụ otu n'ime njirimara bụ isi nke ngwa ngwa HPMC.
2. Ọdịdị na Njirimara nke HPMC
2.1 Chemical Ọdịdị
HPMC bụ cellulose ether ọkara sịntetik. Ihe nnọchi hydroxypropyl na methyl na nhazi kemịkalụ na-enye ya ihe solubility pụrụ iche na ihe ndị nwere colloidal. Ihe owuwu bụ isi nke HPMC nwere agbụ β-D-glucose nke cellulose, nke ejiri otu methyl na hydroxypropyl dochie ụfọdụ otu hydroxyl. Ọnọdụ na ogo nke nnọchi nke ihe ndị a na-emetụta kpọmkwem solubility, viscosity na njide mmiri nke HPMC.
2.2 Njirimara anụ ahụ
Mmiri solubility: HPMC na-adị mfe soluble na mmiri oyi ma mepụta ngwọta colloidal na mmiri ọkụ.
Ngwongwo na-agba agba: Ọ nwere ike ịmepụta ngwọta viscous na mmiri ma nwee mmetụta dị mma.
Ihe na-emepụta ihe nkiri: Ọ nwere ike ịmepụta ihe nkiri transperent na nke na-agbanwe agbanwe.
Nkwusioru: Ọ nwere ezigbo arụmọrụ nkwusioru na ngwọta ma nwee ike mee ka okwu kwụsịtụrụ.
3. Njide mmiri nke HPMC
3.1 Usoro njide mmiri
A na-ekwu na njigide mmiri nke HPMC bụ njikọ dị n'etiti hydroxyl na ndị nọchiri anya ya n'ụdị molekụla ya na ụmụ irighiri mmiri. Kpọmkwem, HPMC na-ejigide mmiri site na usoro ndị a:
Njikọta hydrogen: Otu hydroxyl dị na ụmụ irighiri ihe HPMC na-eme njikọ hydrogen na ụmụ irighiri mmiri. Ike a na-eme ka ụmụ irighiri mmiri kechie ya na HPMC, na-ebelata ikuku mmiri.
Mmetụta viscosity dị elu: Ngwọta viscosity dị elu nke HPMC guzobere na mmiri nwere ike igbochi mmegharị mmiri, si otú ahụ belata ọnwụ mmiri.
Ọdịdị netwọk: Usoro netwọk nke HPMC hibere na mmiri nwere ike ijide ma jigide ụmụ irighiri mmiri, nke mere na mmiri na-ekesa nke ọma na nhazi netwọk.
Mmetụta colloid: Colloid nke HPMC mebere nwere ike igbachi mmiri n'ime colloid ma mee ka oge njigide mmiri dịkwuo elu.
3.2 Ihe na-emetụta njide mmiri
Ọkwa nke nnọchi: Njide mmiri nke HPMC na-emetụta ogo nnọchi (DS). Ka ogo nke nnọchi dị elu, ka hydrophilicity nke HPMC na-esiwanye ike ma na-arụ ọrụ njigide mmiri ya ka mma.
Arọ molecular: Ibu arọ nke dị elu na-enyere aka ịmepụta netwọk yinye molekụla siri ike, si otú a na-eme ka njide mmiri dịkwuo mma.
Ntụkwasị obi: Ntuba nke ngwọta HPMC nwere mmetụta dị ukwuu na njide mmiri. Ngwọta ntinye uche dị elu na-enwe ike ịmepụta ihe ngwọta viscous na nhazi netwọk ndị kwụsiri ike, si otú a na-ejigide mmiri.
Okpomọkụ: Njide mmiri nke HPMC dịgasị iche na okpomọkụ. Mgbe okpomọkụ na-ebili, viscosity nke ngwọta HPMC na-ebelata, na-ebute mbelata nke njide mmiri.
4. Ngwa nke HPMC dị iche iche ubi
4.1 Ihe owuwu ụlọ
N'ime ihe owuwu ụlọ, a na-eji HPMC eme ihe dị ka ihe na-ejide mmiri maka ciment na ngwaahịa gypsum. Isi ọrụ ya gụnyere:
Meziwanye arụmọrụ ihe owuwu: Site n'ịkwado oke mmiri kwesịrị ekwesị, a na-agbatị oge nke ciment na gypsum na-emeghe, na-eme ka usoro ihe owuwu ahụ dịkwuo mma.
Belata mgbawa: Njide mmiri dị mma na-enyere aka belata mgbawa na-emepụta n'oge usoro ihicha ma mee ka ike na ịdịte aka nke ihe ikpeazụ dị mma.
Melite ike nkekọ: Na nrapado taịlị, HPMC nwere ike ịbawanye ike nkekọ ma welie mmetụta njikọ.
4.2 Nkwadebe ọgwụ
Na nkwadebe ọgwụ, njigide mmiri nke HPMC na-arụ ọrụ dị mkpa na ntọhapụ na nkwụsi ike nke ọgwụ:
Nkwadebe ntọhapụ na-adịgide adịgide: Enwere ike iji HPMC dị ka matriks ntọhapụ na-adịgide adịgide maka ọgwụ iji nweta ntọhapụ ọgwụ na-adịgide adịgide site na ịchịkwa ntinye mmiri na ọnụego mgbasa ọgwụ.
Thickerers na binders: N'ime ọgwụ mmiri mmiri na mbadamba, HPMC na-arụ ọrụ dị ka ihe na-ekekọta ihe na-ejigide nkwụsi ike na nkwụsi ike nke ọgwụ.
4.3 Ihe mgbakwunye nri
N'ime ụlọ ọrụ nri, HPMC na-arụ ọrụ dị ka onye na-agba ume na stabilizer, a na-ejikwa njigide mmiri ya maka:
Ịmalite uto: Site na njide mmiri, HPMC nwere ike melite udidi na uto nri, na-eme ka ọ dịkwuo mma ma na-atọ ụtọ.
Ịgbatị ndụ nchekwa: Site na njide mmiri, HPMC nwere ike igbochi mmiri n'oge nchekwa, si otú a na-agbatị ndụ shelf.
4.4 Ihe ịchọ mma
N'ihe ịchọ mma, a na-eji njigide mmiri nke HPMC maka:
Mmetụta moisturize: Dị ka moisturizer, HPMC nwere ike inye aka igbachi mmiri n'elu akpụkpọ ahụ ma nye mmetụta moisturize ogologo oge.
Nkwụsi ike nkwusioru: Na emulsions na nkwusioru, HPMC na-eme ka ngwaahịa ahụ kwụsie ike ma gbochie stratification na sedimentation.
Njide mmiri nke HPMC na-eme ka ọ bụrụ ihe dị mkpa na-arụ ọrụ n'ọtụtụ mpaghara. Ọ na-ejigide mmiri ma na-ebelata evaporation mmiri site na hydrogen bonding, elu viscosity mmetụta, netwọk Ọdịdị na colloid mmetụta. A na-emetụta njide mmiri site na ogo ngbanwe, ịdị arọ molecular, itinye uche na okpomọkụ, nke na-ekpebi arụmọrụ nke HPMC na ngwa ngwa. Ma na ihe owuwu ụlọ, nkwadebe ọgwụ, ihe mgbakwunye nri ma ọ bụ ihe ịchọ mma, njide mmiri nke HPMC na-arụ ọrụ dị mkpa n'ịkwalite àgwà na arụmọrụ nke ngwaahịa ahụ.
Oge nzipu: Jun-26-2024